Flex Alert issued across California amid heat wave

The California Independent System Operator, which manages the state's power grid, issued a statewide Flex Alert that will be in effect from 1 to 10 p.m. Friday, calling for voluntary electricity conservation.

"Consumers are urged to conserve electricity during the afternoon when air conditioners typically are at peak use. Consumers can help avoid power interruptions by turning off all unnecessary lights, using major appliances before 1 p.m. and after 10 p.m., and setting air conditioners to 78 degrees or higher," the California ISO said in a statement.

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